TY - CONF
T1 - Evaluation of properties of soil-based filling material for radiation shielding and water sealing
AU - Yoshikawa, Ema
AU - Komine, H.
AU - Goto, S.
N1 - Funding Information:
This research was conducted with support from ‘Human Resource Development and Research Program for Decommissioning of Fukushima Daiichi Nuclear Power Station’ by the Japan Ministry of Education, Culture, Sports, Science and Technology.
Publisher Copyright:
Copyright © Soil Mechanics and Geotechnical Engineering, ARC 2019.All rights reserved.
PY - 2020
Y1 - 2020
N2 - The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.
AB - The 2011 off the Pacific coast of Tohoku earthquake affected Japan, causing severe damage to the Fukushima Daiichi Nuclear Power Station (1F). To decommission 1F reliably, it is necessary to protect workers from radiation exposure and to prevent leakage of contaminated water into the damaged nuclear buildings. The use of a filling type soil material, super heavy bentonite slurry (SHBS), which consists of sodium-bentonite slurry with barite powder, has been examined for water sealing with radiation shielding capabilities. In this study, radiation shielding capabilities test and falling head permeability test were done. This study proved that SHBS has superb performance as a filling-type water stopping material intended for radiation shielding during NPS decommissioning because it has greater gamma ray shielding capability and almost identical neutron beam shielding capability to that of tap water.
KW - Hydraulic conductivity
KW - Radiation
KW - Slurry
UR - http://www.scopus.com/inward/record.url?scp=85084944928&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85084944928&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85084944928
T2 - 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019
Y2 - 14 October 2019 through 18 October 2019
ER -